BD1754HFN Datasheet, PDF (1/12 Pages) Rohm – Constant Current Backlight Driver for LCD Panels (Non-step-up Type)

LED Drivers for LCD Backlights
Constant Current Backlight Driver
for LCD Panels (Non-step-up Type)
BD1754HFN
No.11040EBT25
●Description
The multi-level brightness control LED works as a constant current driver in 64 steps, so that the driving current can be
adjusted finely. BD1754HFN is best suited to turn on LEDs that require high-accuracy LED brightness control.
●Features
1) Current regulation for LED up to 4 parallels
2) Adjustable constant current 64 steps
3) High accuracy and matching of each current channel (0.5% Typ)
4) Brightness control via a single-line digital control interface (Uni-Port Interface Control = UPIC)
5) 2.9 mm x 3.0 mm HSON8 Small package
●Applications
This driver can be used in various fields such as mobile phones, portable game machines and etc.
●Absolute Maximum Ratings(Ta = 25 ℃)
Parameter
Symbol
Ratings
Unit
Maximum applied voltage
Power dissipation
VMAX
Pd
7
630 ^(*1)
V
mW
Operating temperature range
Topr
-30 ~ +85
℃
Storage temperature range
Tstg
-55 ~ +150
℃
(*1) This value is the measurement value when the driver is mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm).
When using the driver at Ta of 25 ℃ or higher, the power is dissipated by approx. 5.04 mW/℃.
●Recommended Operating Conditions (Ta = -30 ℃ to +85 ℃)
Parameter
Symbol
Ratings
Min Typ Max
Unit
Operating power supply voltage
Vin
2.7
3.6
5.5
V
Condition
Driver pin voltage range
VDRV
0.2
- Vin-1.4 V When Current driver power on.
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2011.06 - Rev.B